Fix comments

tests/ice40/add_sub.ys

@@ -1,6 +1,6 @@
 read_verilog add_sub.v
 hierarchy -top top
-equiv_opt -assert -map +/ice40/cells_sim.v synth_ice40 # equivalency check same as technology-dependent fine-grained synthesis
+equiv_opt -assert -map +/ice40/cells_sim.v synth_ice40 # equivalency check
 design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
 cd top # Constrain all select calls below inside the top module
 select -assert-count 11 t:SB_LUT4

tests/ice40/adffs.ys

@@ -1,8 +1,8 @@
 read_verilog adffs.v
 proc
-async2sync
+async2sync # converts async flops to a 'sync' variant clocked by a 'super'-clock
 flatten
-equiv_opt -assert -map +/ice40/cells_sim.v synth_ice40 # equivalency check same as technology-dependent fine-grained synthesis
+equiv_opt -assert -map +/ice40/cells_sim.v synth_ice40 # equivalency check
 design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
 cd top # Constrain all select calls below inside the top module
 select -assert-count 1 t:SB_DFF

tests/ice40/dffs.ys

@@ -2,7 +2,7 @@ read_verilog dffs.v
 hierarchy -top top
 proc
 flatten
-equiv_opt -assert -map +/ice40/cells_sim.v synth_ice40 # equivalency check same as technology-dependent fine-grained synthesis
+equiv_opt -assert -map +/ice40/cells_sim.v synth_ice40 # equivalency check
 design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
 cd top # Constrain all select calls below inside the top module
 select -assert-count 1 t:SB_DFF

tests/ice40/div_mod.ys

@@ -1,7 +1,7 @@
 read_verilog div_mod.v
 hierarchy -top top
 flatten
-equiv_opt -assert -map +/ice40/cells_sim.v synth_ice40 # equivalency check same as technology-dependent fine-grained synthesis
+equiv_opt -assert -map +/ice40/cells_sim.v synth_ice40 # equivalency check
 design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
 cd top # Constrain all select calls below inside the top module
 select -assert-count 88 t:SB_LUT4

tests/ice40/memory.ys

@@ -2,4 +2,5 @@ read_verilog memory.v
 synth_ice40
 cd top
 select -assert-count 1 t:SB_RAM40_4K
+select -assert-none t:SB_RAM40_4K %% t:* %D
 write_verilog memory_synth.v

tests/ice40/mul.ys

@@ -1,6 +1,6 @@
 read_verilog mul.v
 hierarchy -top top
-equiv_opt -assert -map +/ice40/cells_sim.v synth_ice40 -dsp # equivalency check same as technology-dependent fine-grained synthesis
+equiv_opt -assert -map +/ice40/cells_sim.v synth_ice40 -dsp # equivalency check
 design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
 cd top # Constrain all select calls below inside the top module
 select -assert-count 1 t:SB_MAC16

tests/ice40/mux.ys

@@ -1,8 +1,8 @@
 read_verilog mux.v
 proc
 flatten
-equiv_opt -assert -map +/ice40/cells_sim.v synth_ice40
+equiv_opt -assert -map +/ice40/cells_sim.v synth_ice40 # equivalency check
-design -load postopt
+design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
-cd top
+cd top # Constrain all select calls below inside the top module
 select -assert-count 19 t:SB_LUT4
 select -assert-none t:SB_LUT4 %% t:* %D

tests/ice40/tribuf.ys

@@ -2,7 +2,7 @@ read_verilog tribuf.v
 hierarchy -top top
 proc
 flatten
-equiv_opt -assert -map +/ice40/cells_sim.v synth_ice40 # equivalency check same as technology-dependent fine-grained synthesis
+equiv_opt -assert -map +/ice40/cells_sim.v synth_ice40 # equivalency check
 design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
 cd top # Constrain all select calls below inside the top module
 select -assert-count 1 t:$_TBUF_